/* =============================================================================
 * styles.css  —  视唱练耳训练台
 * 设计原则：极简、干净背景、统一字体、克制配色（主色 indigo + 语义色）
 * 五线谱/琴键/五度圈使用「浅色纸面」面板，保证谱面清晰可读
 * ========================================================================== */

/* ------------------------------- 主题变量 -------------------------------- */
:root,
:root[data-theme="dark"] {
  --bg: #0d1017;
  --bg-elev: #121722;
  --panel: #161c26;
  --panel-2: #1c232f;
  --panel-3: #222a38;
  --border: #262f3d;
  --border-soft: #1e2632;
  --text: #e7ebf3;
  --text-dim: #9ca7ba;
  --text-mute: #6d7889;
  --primary: #6366f1;
  --primary-hi: #7c7ff3;
  --primary-soft: rgba(99, 102, 241, 0.16);
  --primary-line: rgba(99, 102, 241, 0.42);
  --ok: #34d399;
  --ok-soft: rgba(52, 211, 153, 0.14);
  --bad: #f87171;
  --bad-soft: rgba(248, 113, 113, 0.14);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.14);
  --paper: #f7f8fb;
  --paper-2: #eceff5;
  --paper-line: #d3d9e4;
  --paper-ink: #232833;
  --paper-dim: #6b7484;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.34);
  --shadow-sm: 0 3px 10px rgba(0, 0, 0, 0.24);
  --radius: 14px;
  --radius-sm: 9px;
  --font: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Consolas, monospace;
}

:root[data-theme="light"] {
  --bg: #f4f6fa;
  --bg-elev: #ffffff;
  --panel: #ffffff;
  --panel-2: #f3f5f9;
  --panel-3: #e9edf4;
  --border: #e0e5ee;
  --border-soft: #eceff5;
  --text: #1b2130;
  --text-dim: #5a657a;
  --text-mute: #8b95a8;
  --primary: #4f46e5;
  --primary-hi: #635bff;
  --primary-soft: rgba(79, 70, 229, 0.10);
  --primary-line: rgba(79, 70, 229, 0.35);
  --ok: #10b981;
  --ok-soft: rgba(16, 185, 129, 0.12);
  --bad: #ef4444;
  --bad-soft: rgba(239, 68, 68, 0.10);
  --warn: #d97706;
  --warn-soft: rgba(217, 119, 6, 0.12);
  --paper: #ffffff;
  --paper-2: #f1f4f9;
  --paper-line: #d8dfe9;
  --paper-ink: #232833;
  --paper-dim: #6b7484;
  --shadow: 0 10px 30px rgba(23, 32, 56, 0.10);
  --shadow-sm: 0 2px 8px rgba(23, 32, 56, 0.07);
}

/* --------------------------------- 基础 ---------------------------------- */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0; }
button { font-family: inherit; font-size: inherit; color: inherit; }
code, pre { font-family: var(--mono); }
::selection { background: var(--primary-soft); }

/* -------------------------------- 顶部栏 -------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 18px;
  padding: 10px 20px;
  background: var(--bg-elev);
  background: color-mix(in srgb, var(--bg-elev) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, var(--primary), var(--primary-hi));
  color: #fff;
}
.brand-title { font-size: 15px; font-weight: 700; letter-spacing: 0.01em; }
.brand-sub { font-size: 10.5px; color: var(--text-mute); letter-spacing: 0.06em; text-transform: uppercase; }
.nav { display: flex; gap: 2px; flex: 1 1 auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav-item {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 13px; border: 0; border-radius: 10px;
  background: transparent; color: var(--text-dim);
  cursor: pointer; white-space: nowrap; transition: background .16s, color .16s;
}
.nav-item:hover { background: var(--panel-2); color: var(--text); }
.nav-item.active { background: var(--primary-soft); color: var(--primary-hi); }
:root[data-theme="light"] .nav-item.active { color: var(--primary); }
.nav-icon { display: inline-flex; }
.topbar-actions { display: flex; gap: 8px; flex: 0 0 auto; }
.icon-btn {
  width: 34px; height: 34px; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--panel); color: var(--text-dim); cursor: pointer;
  transition: background .16s, color .16s, border-color .16s;
}
.icon-btn:hover { background: var(--panel-2); color: var(--text); border-color: var(--primary-line); }

/* --------------------------------- 视图 ---------------------------------- */
.view { flex: 1 1 auto; width: 100%; max-width: 1180px; margin: 0 auto; padding: 22px 20px 40px; }
.page { display: flex; flex-direction: column; gap: 20px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.page-head-left { display: flex; align-items: center; gap: 12px; }
.page-head-icon {
  width: 40px; height: 40px; border-radius: 12px; display: grid; place-items: center;
  background: var(--primary-soft); color: var(--primary-hi);
}
:root[data-theme="light"] .page-head-icon { color: var(--primary); }
.page-title { font-size: 20px; }
.page-sub { font-size: 12.5px; color: var(--text-dim); max-width: 720px; }
.section { display: flex; flex-direction: column; gap: 12px; }
.section-title { font-size: 14px; color: var(--text-dim); font-weight: 620; letter-spacing: .02em; }

/* ------------------------------ 顶部英雄区 ------------------------------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 22px;
  padding: 26px; border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 0% 0%, var(--primary-soft), transparent 58%),
    var(--panel);
  border: 1px solid var(--border);
}
.hero-title { font-size: 27px; letter-spacing: -0.02em; }
.hero-sub { margin-top: 8px; font-size: 13.5px; color: var(--text-dim); max-width: 620px; }
.hero-actions { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.hero-stats {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
  align-content: center;
}
.hero-stat { padding: 12px 14px; border-radius: var(--radius-sm); background: var(--panel-2); border: 1px solid var(--border-soft); }
.hero-stat-num { font-size: 21px; font-weight: 700; font-family: var(--mono); letter-spacing: -0.02em; }
.hero-stat-label { font-size: 11.5px; color: var(--text-mute); }

/* ------------------------------ 题型卡片 -------------------------------- */
.mode-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); gap: 12px; }
.mode-card {
  text-align: left; cursor: pointer; padding: 15px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; gap: 8px;
  transition: border-color .16s, transform .16s, background .16s;
}
.mode-card:hover { border-color: var(--primary-line); transform: translateY(-2px); background: var(--panel-2); }
.mode-card-head { display: flex; align-items: center; gap: 9px; }
.mode-card-icon { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-hi); }
:root[data-theme="light"] .mode-card-icon { color: var(--primary); }
.mode-card-name { font-weight: 640; font-size: 14.5px; }
.mode-card-desc { font-size: 12px; color: var(--text-dim); flex: 1 1 auto; }
.mode-card-foot { display: flex; gap: 6px; flex-wrap: wrap; }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(272px, 1fr)); gap: 10px; }
.feature-card {
  display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 13px 15px; border-radius: var(--radius-sm); cursor: pointer;
  background: var(--panel); border: 1px solid var(--border);
  transition: border-color .16s, background .16s;
}
.feature-card:hover { border-color: var(--primary-line); background: var(--panel-2); }
.feature-icon { color: var(--primary-hi); display: inline-flex; flex: 0 0 auto; }
:root[data-theme="light"] .feature-icon { color: var(--primary); }
.feature-body { display: flex; flex-direction: column; }
.feature-title { font-weight: 620; font-size: 13.5px; }
.feature-desc { font-size: 11.5px; color: var(--text-mute); }

/* -------------------------------- 面板 ---------------------------------- */
.panel {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
}
.panel-title {
  display: flex; align-items: center; gap: 8px; margin-bottom: 12px;
  font-size: 13.5px; font-weight: 640; color: var(--text-dim);
}
.panel-title .icon { color: var(--primary-hi); }
:root[data-theme="light"] .panel-title .icon { color: var(--primary); }

/* -------------------------------- 按钮 ---------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 8px 15px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); cursor: pointer;
  font-weight: 560; font-size: 13px;
  transition: background .15s, border-color .15s, transform .1s, opacity .15s;
}
.btn:hover { border-color: var(--primary-line); }
.btn:active { transform: scale(.985); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hi); border-color: var(--primary-hi); }
.btn-ghost { background: transparent; }
.btn-ghost:hover { background: var(--panel-2); }
.btn-danger { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.btn-lg { padding: 10px 19px; font-size: 13.5px; border-radius: 11px; }
.btn:disabled, .btn.is-disabled { opacity: .45; cursor: not-allowed; }
.btn.is-playing { opacity: .7; }
.btn-icon { display: inline-flex; }
.btn-mini {
  padding: 4px 10px; font-size: 11.5px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel-2);
  color: var(--text-dim); cursor: pointer;
}
.btn-mini:hover { color: var(--text); border-color: var(--primary-line); }
.btn-mini-danger:hover { color: var(--bad); border-color: var(--bad); }

/* ------------------------------ 分段选项卡 ------------------------------- */
.seg-tabs {
  display: inline-flex; gap: 3px; padding: 3px;
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 11px;
}
.seg-tabs.wrap { flex-wrap: wrap; }
.seg-tab {
  border: 0; background: transparent; color: var(--text-dim);
  padding: 6px 13px; border-radius: 8px; cursor: pointer; font-size: 12.5px;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
  transition: background .15s, color .15s;
}
.seg-tab:hover { color: var(--text); }
.seg-tab.active { background: var(--panel); color: var(--text); box-shadow: var(--shadow-sm); }

/* ------------------------------ 控件条 ---------------------------------- */
.ctrl-bar { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.ctrl-bar + .ctrl-bar { margin-top: 12px; }
.ctrl-group { display: flex; align-items: center; gap: 8px; }
.ctrl-label { font-size: 11.5px; color: var(--text-mute); letter-spacing: .03em; }
.pill-row { display: flex; gap: 3px; padding: 3px; background: var(--panel-2); border: 1px solid var(--border); border-radius: 9px; }
.pill {
  border: 0; background: transparent; color: var(--text-dim);
  padding: 4px 11px; border-radius: 7px; cursor: pointer; font-size: 12px;
  transition: background .15s, color .15s;
}
.pill:hover { color: var(--text); }
.pill.active { background: var(--primary-soft); color: var(--primary-hi); }
:root[data-theme="light"] .pill.active { color: var(--primary); }

/* ------------------------------ 练耳训练器 ------------------------------- */
.trainer { display: flex; flex-direction: column; gap: 16px; }
.trainer-top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 14px 16px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
}
.trainer-head-left { display: flex; align-items: center; gap: 11px; }
.trainer-head-icon { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-hi); }
:root[data-theme="light"] .trainer-head-icon { color: var(--primary); }
.trainer-head-title { font-weight: 660; font-size: 16px; }
.trainer-head-sub { font-size: 11.5px; color: var(--text-mute); }
.trainer-head-right { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.quiz-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 14px;
}
.quiz-card-head { display: flex; justify-content: space-between; align-items: center; }
.quiz-meta { font-size: 12.5px; color: var(--text-dim); }
.quiz-meta b { color: var(--text); font-family: var(--mono); }
.quiz-prompt { font-size: 19px; font-weight: 660; letter-spacing: -0.01em; }
.quiz-hint { font-size: 12px; color: var(--text-mute); }
.quiz-visual:empty { display: none; }
.quiz-playrow { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.btn-play { min-width: 108px; }

/* 视唱页·节拍器运行指示（每拍点亮一个点，首拍加粗）
   未点亮的点必须仍有足够对比度——面板底色很深，若用 --panel-3 当底色会几乎看不见，
   用户会误以为「拍点数不对」。故未点亮态用中性灰 + 透明度，点亮态用主色。 */
.metro-beats { display: inline-flex; align-items: center; gap: 5px; min-height: 14px; }
.beat-dot {
  display: block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--text-mute); opacity: .42;
  transition: background .09s linear, opacity .09s linear, transform .09s linear;
}
.beat-dot.accent { width: 8px; height: 8px; }
.beat-dot.on { background: var(--primary); opacity: 1; transform: scale(1.3); }
.beat-dot.accent.on { background: var(--primary-hi); }
.quiz-playbar { flex: 1 1 160px; min-width: 120px; }
.quiz-bar { height: 5px; border-radius: 3px; background: var(--panel-3); overflow: hidden; }
.quiz-bar-fill { height: 100%; width: 0; background: linear-gradient(90deg, var(--primary), var(--primary-hi)); border-radius: 3px; }

.quiz-options { display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: 9px; }
.quiz-options.options-notation { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.opt {
  position: relative; display: flex; align-items: center; gap: 9px; text-align: left;
  padding: 12px 13px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--panel-2); color: var(--text);
  cursor: pointer; transition: border-color .15s, background .15s, transform .1s;
  min-height: 52px; min-width: 0;
}
.opt:hover { border-color: var(--primary-line); background: var(--panel-3); }
.opt:active { transform: scale(.99); }
.opt:disabled { cursor: default; }
.opt-key {
  flex: 0 0 auto; width: 20px; height: 20px; border-radius: 6px;
  display: grid; place-items: center; font-size: 10.5px; font-family: var(--mono);
  background: var(--panel-3); color: var(--text-mute);
}
.opt-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; flex: 1 1 auto; }
.opt-label { font-weight: 580; font-size: 13.5px; }
.opt-sub { font-size: 11px; color: var(--text-mute); }
.opt-correct { border-color: var(--ok); background: var(--ok-soft); }
.opt-correct .opt-key { background: var(--ok); color: #06251a; }
.opt-wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt-wrong .opt-key { background: var(--bad); color: #2b0b0b; }
.opt-chosen { border-color: var(--primary); background: var(--primary-soft); }
.opt-dim { opacity: .48; }
.opt-notation { flex-direction: column; align-items: stretch; padding: 8px; min-width: 0; }
.opt-notation .opt-key { position: absolute; top: 6px; left: 6px; z-index: 2; }
.opt-stave {
  background: var(--paper); border-radius: 8px; padding: 2px 4px; min-width: 0;
  overflow: hidden; display: flex; align-items: center; justify-content: center; min-height: 112px;
}
.opt-stave svg { display: block; width: 100%; height: auto; }

.quiz-feedback { border-radius: var(--radius-sm); padding: 0; font-size: 13px; }
.quiz-feedback.ok, .quiz-feedback.bad { padding: 12px 14px; border: 1px solid var(--border); }
.quiz-feedback.ok { background: var(--ok-soft); border-color: rgba(52, 211, 153, .4); }
.quiz-feedback.bad { background: var(--bad-soft); border-color: rgba(248, 113, 113, .4); }
.fb-head { display: flex; align-items: center; gap: 8px; font-weight: 620; }
.fb-icon { display: inline-flex; }
.fb-title { font-size: 14px; }
.fb-ans { margin-left: auto; color: var(--text-dim); font-size: 12.5px; }
.fb-detail { margin-top: 7px; color: var(--text-dim); font-size: 12.5px; display: flex; gap: 7px; align-items: baseline; }
.fb-tag {
  flex: 0 0 auto; font-size: 10.5px; padding: 1px 7px; border-radius: 6px;
  background: var(--panel-3); color: var(--text-mute);
}
.quiz-actions { display: flex; justify-content: flex-end; gap: 9px; }

/* ------------------------------ 结算页 ---------------------------------- */
.result { display: flex; flex-direction: column; gap: 16px; }
.result-top { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.result-score { text-align: center; min-width: 92px; }
.result-score-num { font-size: 44px; font-weight: 750; font-family: var(--mono); line-height: 1.05; letter-spacing: -0.03em; }
.result-score-label { font-size: 11.5px; color: var(--text-mute); }
.result-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); gap: 10px; flex: 1 1 320px; }
.rs { display: flex; flex-direction: column; padding: 9px 12px; background: var(--panel-2); border-radius: var(--radius-sm); border: 1px solid var(--border-soft); }
.rs b { font-size: 16px; font-family: var(--mono); }
.rs span { font-size: 11px; color: var(--text-mute); }
.result-grade { padding: 6px 15px; border-radius: 999px; font-weight: 640; font-size: 13px; }
.grade-good { background: var(--ok-soft); color: var(--ok); }
.grade-mid { background: var(--warn-soft); color: var(--warn); }
.grade-bad { background: var(--bad-soft); color: var(--bad); }
.result-sec-title { font-size: 12.5px; color: var(--text-mute); letter-spacing: .03em; border-top: 1px solid var(--border-soft); padding-top: 12px; }
.review-list { display: flex; flex-direction: column; gap: 6px; max-height: 360px; overflow-y: auto; }
.review-row { display: flex; align-items: flex-start; gap: 9px; padding: 9px 11px; border-radius: var(--radius-sm); background: var(--panel-2); border-left: 3px solid var(--border); }
.review-row.ok { border-left-color: var(--ok); }
.review-row.bad { border-left-color: var(--bad); }
.review-idx { font-family: var(--mono); font-size: 11px; color: var(--text-mute); width: 18px; flex: 0 0 auto; }
.review-icon { display: inline-flex; flex: 0 0 auto; }
.review-row.ok .review-icon { color: var(--ok); }
.review-row.bad .review-icon { color: var(--bad); }
.review-body { flex: 1 1 auto; min-width: 0; }
.review-ans { font-size: 12.5px; font-weight: 580; }
.review-detail { font-size: 11.5px; color: var(--text-mute); }

/* -------------------------------- 面包屑 -------------------------------- */
.crumb { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--text-mute); }
.crumb-btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px;
  border-radius: 9px; border: 1px solid var(--border); background: var(--panel);
  color: var(--text-dim); cursor: pointer;
}
.crumb-btn:hover { color: var(--text); border-color: var(--primary-line); }
.crumb-sep { color: var(--text-mute); }
.crumb-cur { color: var(--text); font-weight: 580; }

/* -------------------------------- 视唱 ---------------------------------- */
.sight-grid { display: grid; grid-template-columns: minmax(0, 1.75fr) minmax(300px, 1fr); gap: 14px; align-items: start; }
.sight-grid.single { grid-template-columns: minmax(0, 1fr); }
.sight-side { display: flex; flex-direction: column; gap: 14px; }
.staff-panel { background: var(--paper); border-color: var(--paper-line); padding: 8px 6px; overflow-x: auto; }
.staff-panel svg { display: block; max-width: 100%; height: auto; }
.vex-missing { color: var(--paper-dim); font-size: 12px; padding: 20px; text-align: center; }

.tuner-display { text-align: center; margin-bottom: 14px; }
.tuner-big-note { font-size: 46px; font-weight: 750; font-family: var(--mono); letter-spacing: -0.03em; line-height: 1.1; }
.tuner-big-sol { font-size: 12.5px; color: var(--text-mute); }
.tuner-big-cents { font-size: 15px; font-family: var(--mono); margin-top: 5px; color: var(--text-dim); }
.tuner-big-cents.ok { color: var(--ok); }
.tuner-big-cents.near { color: var(--warn); }
.tuner-big-cents.off { color: var(--bad); }
.tuner-freq { font-size: 11.5px; color: var(--text-mute); font-family: var(--mono); }
.tuner-scale {
  position: relative; height: 40px; margin: 10px 0 6px;
  background: var(--panel-2); border-radius: 10px; border: 1px solid var(--border-soft); overflow: hidden;
}
.tuner-scale.big { height: 54px; }
.tuner-track { position: absolute; inset: 0; }
.tuner-center { position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--border); }
.tuner-needle {
  position: absolute; top: 6px; bottom: 6px; left: 50%; width: 3px; margin-left: -1.5px;
  background: var(--primary); border-radius: 2px; transition: left .07s linear;
}
.tuner-needle.hit { background: var(--ok); box-shadow: 0 0 12px var(--ok-soft); }
.tuner-legend { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--text-mute); font-family: var(--mono); }
.legend-mid { color: var(--ok); }
.tuner-compact { margin-top: 10px; }
.cents-trace { width: 100%; height: 54px; display: block; margin-top: 8px; }
.cents-trace.big { height: 96px; }
.tuner-note-hint { margin-top: 12px; font-size: 11.5px; color: var(--text-mute); }
.empty-tip { font-size: 12.5px; color: var(--text-mute); padding: 12px 0; }

.sing-now { text-align: center; margin-bottom: 6px; }
.sing-note { font-size: 38px; font-weight: 740; font-family: var(--mono); line-height: 1.1; letter-spacing: -0.02em; }
.sing-sol { font-size: 13px; color: var(--primary-hi); font-weight: 600; }
:root[data-theme="light"] .sing-sol { color: var(--primary); }
.sing-pos { font-size: 11.5px; color: var(--text-mute); }
.sing-badges { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 12px; }
.sing-badge {
  width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
  font-size: 11px; font-family: var(--mono);
  background: var(--panel-2); color: var(--text-mute); border: 1px solid var(--border-soft);
}
.sing-badge.current { border-color: var(--primary); color: var(--primary-hi); background: var(--primary-soft); }
.sing-badge.ok { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.sing-badge.bad { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.mic-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.mic-status { font-size: 12px; color: var(--text-mute); margin-top: 9px; }

/* ------------------------------ 节奏模仿 -------------------------------- */
.tap-panel { display: flex; flex-direction: column; gap: 14px; }
.tap-pad {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 26px; text-align: center; cursor: pointer; outline: none;
  background: var(--panel-2); transition: border-color .15s, background .15s, transform .07s;
  user-select: none;
}
.tap-pad:hover { border-color: var(--primary-line); }
.tap-pad.armed { border-color: var(--ok); background: var(--ok-soft); }
.tap-pad.flash { background: var(--primary-soft); border-color: var(--primary); transform: scale(.994); }
.tap-pad-title { font-size: 15px; font-weight: 640; }
.tap-pad-sub { font-size: 12px; color: var(--text-mute); }
.tap-timeline { width: 100%; height: 90px; display: block; background: var(--panel-2); border-radius: 10px; border: 1px solid var(--border-soft); }
.tap-result:empty { display: none; }
.tap-score { display: flex; align-items: center; gap: 16px; padding: 12px 14px; background: var(--panel-2); border-radius: var(--radius-sm); }
.tap-score-num { font-size: 32px; font-weight: 740; font-family: var(--mono); }
.tap-score-info { display: flex; flex-direction: column; font-size: 12px; color: var(--text-mute); }
.tap-score-info strong { font-size: 14px; color: var(--text); }

/* ------------------------------ 乐理速查 -------------------------------- */
.ref-table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.ref-table th, .ref-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border-soft); vertical-align: middle; }
.ref-table th { font-weight: 620; color: var(--text-mute); font-size: 11.5px; letter-spacing: .02em; white-space: nowrap; }
.ref-table tbody tr:hover { background: var(--panel-2); }
.td-strong { font-weight: 600; font-family: var(--mono); }
.ref-note { font-size: 12px; color: var(--text-dim); margin-bottom: 10px; }
.piano-host { background: var(--paper); border-radius: 10px; padding: 12px; overflow-x: auto; }
.kb-info { margin-top: 10px; font-size: 12.5px; color: var(--text-dim); font-family: var(--mono); }
.piano-svg { display: block; }
.pkey { cursor: pointer; }
.pkey-white rect { fill: #ffffff; stroke: #c6cedd; stroke-width: 1; }
.pkey-white.is-c rect { fill: #eef1f7; }
.pkey-black rect { fill: #2b3140; stroke: #1b2029; stroke-width: 1; }
.pkey text { fill: #78829a; font-size: 9px; font-family: var(--font); pointer-events: none; }
.pkey:hover rect { filter: brightness(0.96); }
.pkey.pressed rect { fill: var(--primary); }
.cof-host { background: var(--paper); border-radius: 10px; padding: 12px; max-width: 460px; margin: 0 auto; }
.fifths-svg { display: block; max-width: 460px; margin: 0 auto; }
.cof-bg { fill: #f0f3f9; }
.cof-sector { fill: #e6eaf3; stroke: #d2d9e6; stroke-width: 1; }
.cof-sector.inner { fill: #dbe2ef; }
.cof-center { fill: #ffffff; stroke: #d2d9e6; }
.cof-major { fill: #222a38; font-size: 15px; font-weight: 700; font-family: var(--font); }
.cof-minor { fill: #5a657a; font-size: 10.5px; font-family: var(--font); }
.cof-sig { fill: #8b95a8; font-size: 10px; font-family: var(--mono); }
.cof-center-title { fill: #222a38; font-size: 14px; font-weight: 700; font-family: var(--font); }
.cof-center-sub { fill: #78829a; font-size: 9.5px; font-family: var(--font); }

/* ------------------------------ 统计页面 -------------------------------- */
.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; }
.big-stat { display: flex; gap: 12px; align-items: center; padding: 15px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); }
.big-stat-icon { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary-hi); flex: 0 0 auto; }
:root[data-theme="light"] .big-stat-icon { color: var(--primary); }
.big-stat-label { font-size: 11.5px; color: var(--text-mute); }
.big-stat-value { font-size: 22px; font-weight: 720; font-family: var(--mono); line-height: 1.2; }
.big-stat-sub { font-size: 11px; color: var(--text-mute); }
.perf-list { display: flex; flex-direction: column; gap: 7px; }
.perf-row { display: grid; grid-template-columns: 22px 108px 1fr 48px 74px; gap: 10px; align-items: center; font-size: 12.5px; }
.perf-icon { display: inline-flex; color: var(--text-mute); }
.perf-bar { height: 6px; border-radius: 3px; background: var(--panel-3); overflow: hidden; }
.perf-bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-hi)); border-radius: 3px; }
.perf-val { font-family: var(--mono); text-align: right; font-weight: 600; }
.perf-sub { font-size: 11px; color: var(--text-mute); font-family: var(--mono); }
.trend-canvas { width: 100%; height: 120px; display: block; }
.trend-axis { display: flex; justify-content: space-between; margin-top: 6px; font-size: 10px; color: var(--text-mute); font-family: var(--mono); }
.trend-tick:nth-child(even) { display: none; }
.sess-list { display: flex; flex-direction: column; gap: 5px; }
.sess-row { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: var(--radius-sm); background: var(--panel-2); font-size: 12.5px; flex-wrap: wrap; }
.sess-time { font-family: var(--mono); font-size: 11.5px; color: var(--text-mute); }
.sess-type { font-weight: 580; min-width: 84px; }
.sess-score { margin-left: auto; font-family: var(--mono); font-weight: 640; }
.sess-score.ok { color: var(--ok); } .sess-score.mid { color: var(--warn); } .sess-score.bad { color: var(--bad); }
.sess-sub { font-size: 11px; color: var(--text-mute); font-family: var(--mono); }
.ach-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); gap: 9px; }
.ach { display: flex; gap: 10px; align-items: center; padding: 11px 12px; border-radius: var(--radius-sm); background: var(--panel-2); border: 1px solid var(--border-soft); opacity: .55; }
.ach.on { opacity: 1; border-color: var(--primary-line); background: var(--primary-soft); }
.ach-icon { display: inline-flex; color: var(--text-mute); }
.ach.on .ach-icon { color: var(--primary-hi); }
.ach-body { display: flex; flex-direction: column; }
.ach-title { font-size: 12.5px; font-weight: 600; }
.ach-desc { font-size: 11px; color: var(--text-mute); }

/* -------------------------------- 错题本 -------------------------------- */
.wrong-list { display: flex; flex-direction: column; gap: 9px; }
.wrong-row { padding: 13px 14px; border-radius: var(--radius-sm); background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--bad); }
.wrong-head { display: flex; gap: 6px; align-items: center; margin-bottom: 7px; flex-wrap: wrap; }
.wrong-time { margin-left: auto; font-size: 11px; color: var(--text-mute); font-family: var(--mono); }
.wrong-q { font-size: 12.5px; color: var(--text-dim); }
.wrong-ans { margin-top: 5px; font-size: 13px; display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.wrong-ans-label { color: var(--text-mute); font-size: 11.5px; }
.wrong-ans-val { font-weight: 640; color: var(--ok); }
.wrong-chosen { font-size: 11.5px; color: var(--bad); }
.wrong-detail { margin-top: 6px; font-size: 11.5px; color: var(--text-mute); }
.wrong-actions { display: flex; gap: 7px; margin-top: 9px; }

/* -------------------------------- 设置 ---------------------------------- */
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 12px 0; border-bottom: 1px solid var(--border-soft); }
.set-row:last-child { border-bottom: 0; }
.set-info { min-width: 0; }
.set-title { font-size: 13.5px; font-weight: 580; }
.set-desc { font-size: 11.5px; color: var(--text-mute); }
.set-control { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; }
.switch { width: 42px; height: 24px; border-radius: 999px; border: 1px solid var(--border); background: var(--panel-3); position: relative; cursor: pointer; transition: background .18s, border-color .18s; padding: 0; }
.switch .switch-knob { position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: var(--text-mute); transition: transform .18s, background .18s; }
.switch.on { background: var(--primary-soft); border-color: var(--primary); }
.switch.on .switch-knob { transform: translateX(18px); background: var(--primary); }
.select, .input-num {
  padding: 7px 11px; border-radius: 9px; border: 1px solid var(--border);
  background: var(--panel-2); color: var(--text); font-size: 13px; font-family: inherit;
}
.input-num { width: 84px; font-family: var(--mono); }
.unit-wrap, .range-wrap { display: flex; align-items: center; gap: 9px; }
.unit { font-size: 12px; color: var(--text-mute); }
.range { width: 168px; accent-color: var(--primary); }
.range-val { font-size: 12px; font-family: var(--mono); color: var(--text-dim); width: 38px; text-align: right; }
.file-input { font-size: 12px; color: var(--text-dim); max-width: 230px; }
.about-list { margin: 0; padding-left: 18px; font-size: 12.5px; color: var(--text-dim); display: flex; flex-direction: column; gap: 6px; }

/* ------------------------------ 通用小组件 ------------------------------- */
.chip { font-size: 10.5px; padding: 2px 8px; border-radius: 999px; background: var(--panel-3); color: var(--text-mute); white-space: nowrap; }
.chip-acc { background: var(--primary-soft); color: var(--primary-hi); }
.chip-warn { background: var(--warn-soft); color: var(--warn); }
.notice { display: flex; gap: 9px; align-items: flex-start; padding: 11px 13px; border-radius: var(--radius-sm); font-size: 12.5px; border: 1px solid var(--border); background: var(--panel-2); }
.notice-icon { display: inline-flex; flex: 0 0 auto; margin-top: 1px; }
.notice-warn { background: var(--warn-soft); border-color: rgba(251, 191, 36, .38); }
.notice-ok { background: var(--ok-soft); border-color: rgba(52, 211, 153, .38); }
.empty-state { text-align: center; padding: 46px 20px; color: var(--text-mute); }
.empty-icon { display: inline-flex; color: var(--ok); opacity: .7; }
.empty-title { margin-top: 10px; font-size: 15px; font-weight: 620; color: var(--text-dim); }
.empty-desc { font-size: 12.5px; margin-top: 4px; }
.err { font-size: 11.5px; color: var(--bad); white-space: pre-wrap; }
.help h4 { margin: 14px 0 6px; font-size: 13.5px; }
.help h4:first-child { margin-top: 0; }
.help ul { margin: 0; padding-left: 19px; font-size: 12.5px; color: var(--text-dim); display: flex; flex-direction: column; gap: 4px; }

/* -------------------------------- 提示条 -------------------------------- */
.toast-host { position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%); z-index: 90; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast {
  padding: 10px 17px; border-radius: 11px; font-size: 13px;
  background: var(--panel-3); color: var(--text); border: 1px solid var(--border);
  box-shadow: var(--shadow); animation: toast-in .2s ease-out;
}
.toast-ok { border-color: var(--ok); background: color-mix(in srgb, var(--ok-soft) 70%, var(--panel)); }
.toast-warn { border-color: var(--warn); }
.toast-bad { border-color: var(--bad); }
.toast-out { opacity: 0; transform: translateY(6px); transition: opacity .18s, transform .18s; }
@keyframes toast-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* -------------------------------- 对话框 -------------------------------- */
.modal-overlay {
  position: fixed; inset: 0; z-index: 95; display: grid; place-items: center;
  background: rgba(6, 9, 14, .62); backdrop-filter: blur(3px); padding: 20px;
  animation: fade .16s ease-out;
}
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal-box {
  width: 100%; background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow); max-height: 86vh; display: flex; flex-direction: column;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 15px 18px; border-bottom: 1px solid var(--border-soft); }
.modal-title { font-size: 15.5px; }
.modal-x { border: 0; background: transparent; color: var(--text-mute); font-size: 22px; line-height: 1; cursor: pointer; padding: 0 4px; }
.modal-x:hover { color: var(--text); }
.modal-body { padding: 18px; overflow-y: auto; font-size: 13px; }
.modal-text { font-size: 13.5px; color: var(--text-dim); line-height: 1.75; }
.modal-foot { display: flex; justify-content: flex-end; gap: 9px; padding: 14px 18px; border-top: 1px solid var(--border-soft); }

/* ------------------------------- 彩带效果 ------------------------------- */
.confetti-canvas { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 80; }

/* -------------------------------- 页脚 ---------------------------------- */
.footer {
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  padding: 16px 20px 26px; font-size: 11.5px; color: var(--text-mute);
  max-width: 1180px; margin: 0 auto; width: 100%;
}
.footer-dim { color: var(--text-mute); opacity: .7; }

/* ------------------------------- 响应式 --------------------------------- */
@media (max-width: 1020px) {
  .sight-grid { grid-template-columns: minmax(0, 1fr); }
  .hero { grid-template-columns: minmax(0, 1fr); }
  .perf-row { grid-template-columns: 22px 92px 1fr 44px; }
  .perf-sub { display: none; }
}
@media (max-width: 720px) {
  .view { padding: 16px 13px 32px; }
  .topbar { padding: 9px 13px; gap: 12px; }
  .brand-sub { display: none; }
  .nav-label { display: none; }
  .nav-item { padding: 8px 11px; }
  .quiz-options { grid-template-columns: repeat(auto-fill, minmax(128px, 1fr)); }
  .quiz-options.options-notation { grid-template-columns: minmax(0, 1fr); }
  .hero-title { font-size: 22px; }
  .set-row { flex-direction: column; align-items: flex-start; gap: 9px; }
  .set-control { width: 100%; }
  .range { flex: 1 1 auto; width: auto; }
  .result-score-num { font-size: 36px; }
  .trainer-head-right { gap: 10px; }
  .review-list { max-height: 300px; }
}